Re-implement overscan & Implement Display Rotation

ash/test/display_manager_test_api.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_TEST_DISPLAY_MANAGER_TEST_API_H_
 #define ASH_TEST_DISPLAY_MANAGER_TEST_API_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 13 matching lines @@
   // Update the display configuration as given in |display_specs|. The format of
   // |display_spec| is a list of comma separated spec for each displays. Please
   // refer to the comment in |aura::DisplayManager::CreateDisplayFromSpec| for
   // the format of the display spec.
   void UpdateDisplay(const std::string& display_specs);
 
   // Set the 1st display as an internal display and returns the display Id for
   // the internal display.
   int64 SetFirstDisplayAsInternalDisplay();
 
+  // Don't update the display when the root window's size was changed.
+  void DisableChangeDisplayUponHostResize();
+
  private:
   internal::DisplayManager* display_manager_;  // not owned
 
   DISALLOW_COPY_AND_ASSIGN(DisplayManagerTestApi);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_DISPLAY_MANAGER_TEST_API_H_